/*! `prolog` grammar compiled for Highlight.js 11.10.0 */
var hljsGrammar = (function () {
  'use strict';

  /*
  Language: Prolog
  Description: Prolog is a general purpose logic programming language associated with artificial intelligence and computational linguistics.
  Author: Raivo Laanemets <raivo@infdot.com>
  Website: https://en.wikipedia.org/wiki/Prolog
  Category: functional
  */

  function prolog(hljs) {
    const ATOM = {

      begin: /[a-z][A-Za-z0-9_]*/,
      relevance: 0
    };

    const VAR = {

      className: 'symbol',
      variants: [
        { begin: /[A-Z][a-zA-Z0-9_]*/ },
        { begin: /_[A-Za-z0-9_]*/ }
      ],
      relevance: 0
    };

    const PARENTED = {

      begin: /\(/,
      end: /\)/,
      relevance: 0
    };

    const LIST = {

      begin: /\[/,
      end: /\]/
    };

    const LINE_COMMENT = {

      className: 'comment',
      begin: /%/,
      end: /$/,
      contains: [ hljs.PHRASAL_WORDS_MODE ]
    };

    const BACKTICK_STRING = {

      className: 'string',
      begin: /`/,
      end: /`/,
      contains: [ hljs.BACKSLASH_ESCAPE ]
    };

    const CHAR_CODE = {
      className: 'string', // 0'a etc.
      begin: /0'(\\'|.)/
    };

    const SPACE_CODE = {
      className: 'string',
      begin: /0'\\s/ // 0'\s
    };

    const PRED_OP = { // relevance booster
      begin: /:-/ };

    const inner = [

      ATOM,
      VAR,
      PARENTED,
      PRED_OP,
      LIST,
      LINE_COMMENT,
      hljs.C_BLOCK_COMMENT_MODE,
      hljs.QUOTE_STRING_MODE,
      hljs.APOS_STRING_MODE,
      BACKTICK_STRING,
      CHAR_CODE,
      SPACE_CODE,
      hljs.C_NUMBER_MODE
    ];

    PARENTED.contains = inner;
    LIST.contains = inner;

    return {
      name: 'Prolog',
      contains: inner.concat([
        { // relevance booster
          begin: /\.$/ }
      ])
    };
  }

  return prolog;

})();
;
export default hljsGrammar;